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(11)

EP 4 218 079 A1

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(43) Date of publication: 02.08.2023 Bulletin 2023/31 (21) Application number: 21873632.0 (22) Date of filing: 28.09.2021

(51) International Patent Classification (IPC):  H01M 10/0565(2010.01) H01M 10/054(2010.01) H01M 10/052(2010.01) C08J 5/22(2006.01) (52) Cooperative Patent Classification (CPC): Y02E 60/10; H01M 50/403; H01M 50/42; H01M 50/426; H01M 50/446; H01M 10/056; H01M 2300/0082; H01M 2300/0068; H01M 2300/0091; H01M 10/052; H01M 10/054; H01M 4/382; H01M 4/381; H01M 4/40 (86) International application number: PCT/US2021/052361 (87) International publication number: WO 2022/067239 (31.03.2022 Gazette 2022/13)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 28.09.2020 US 202063084068 P 27.09.2021 US 202117486597 (71) Applicants: Enpower Greentech, Inc. New York, NY 10105 (US) Board of Regents, The University of Texas System Austin, TX 78701 (US)

(72) Inventors: XU, Henghui Austin, TX 78712 (US) LI, Yutao Austin, TX 78712 (US) CHE, Yong Folsom, CA 95630 (US) GOODENOUGH, John, B. Austin, TX 78712 (US) (74) Representative: Marks & Clerk LLP  15 Fetter Lane London EC4A 1BW London EC4A 1BW (GB)